CHEN Chuan-hu, ZOU De-xuan, LIU Hai-kuan. Iris location algorithm by counting distances[J]. Editorial Office of Optics and Precision Engineering, 2012,20(11): 2516-2522
CHEN Chuan-hu, ZOU De-xuan, LIU Hai-kuan. Iris location algorithm by counting distances[J]. Editorial Office of Optics and Precision Engineering, 2012,20(11): 2516-2522 DOI: 10.3788/OPE.20122011.2516.
使用一种改进的Hough变换来获得虹膜外边缘数据。实验结果表明:MCD的内定位时间和外定位时间分别是0.122 2 s和0.242 4 s
均比快速精确虹膜定位法(FAILA)低
且成功率为96.67%
高于FAILA。因此
MCD具有较高的精度和较快的速度
可提高虹膜识别的效率。
Abstract
A Method of Counting Distances (MCD) was proposed to improve the efficiency of iris recognition in this paper. The MCD was used in a denoising for iris edge image
and efficient location methods for both inner and outer circles of the iris were established. First
a method of grey level summation was utilized to find a pixel in the pupil
meanwhile
the iris edge image could be obtained by using the Canny operator
and three edge points of iris inner edge could be found according to the pixel in the pupil. Then
three edge points were derived to the equation of a circle to find the iris inner edge by substituting. Furthermore
the noises in iris outer edge image were eliminated in terms of the inner location data
and 20 percent of the edge points far from the center of inner circle of the iris were excluded from the denoised edge image. Finally
an improved Hough transformation was used to obtain the data of iris outer edge. Experimental results show that both inner and outer location time obtained using MCD is lower than those obtained by the Fast and Accurate Iris Location Algorithm (FAILA)
and the success rate of MCD is 96.67%
which is higher than that of FAILA. Thus
the MCD has high precision and fast speed
and can lay the foundation for improving the efficiency of iris recognition.
关键词
Keywords
references
JIANG X B, YOU X G, YUAN Y, et al.. A me thod using long digital straight segments for fingerprint recognition [J]. Neurocomputing, 2012, 77(1): 28-35.[2] ANDICS A, MCQUEEN J M, PETERSSON K M, et al.. Neural mechanisms for voice recognition [J]. Neuro Image, 2010, 52(4): 1528-1540.[3] PAN X, RUAN Q Q. Palmprint recognition using Gabor-based local invariant features [J]. Neurocomputing, 2009, 72(7-9): 2040-2045.[4] 杨利平,龚卫国,李伟红,等. 随机采样子空间保局投影人脸识别算法[J]. 光学 精密工程, 2008, 16(8): 1465-1470. (in Chinese) YANG L P, GONG W G, LI W H, et al.. Random sampling subspace locality preserving projection for face recognition [J]. Opt. Precision Eng., 2008, 16(8): 1465-1470.[5] 苑玮琦,徐露,林忠华. 基于相位一致性最大响应方向的虹膜识别方法[J]. 光学 精密工程, 2009, 17(1): 179-184. (in Chinese) YUAN W Q, XU L, LIN ZH H. Iris recognition based on maximal responding orientation of phase congruency [J]. Opt. Precision Eng., 2009, 17(1): 179-184.[6] ABHYANKAR A, SCHUCKERS S. A novel bior- thogonal wavelet network system for off-angle iris recognition [J]. Pattern Recognition, 2010, 43(3): 987-1007.[7] DAUGMAN J G. Recognizing persons by their iris. Information Security Technical Report, 1998,3(1), 33-39.[8] WILDES R P. Iris recognition: an emerging biometric technology. Proceeding of the IEEE, 1997, 85(9): 1348-1363.[9] 苑玮琦,徐露,林忠华. 一种新的虹膜图像预处理方法[J]. 光电子激光, 2009, 20(2): 234-239. (in Chinese) YUAN W Q, XU L, LIN ZH H. A novel method of iris image preprocessing [J]. Journal of Optoelectronics.Laser, 2009, 20(2): 234-239. (in Chinese)[10] LU CH H, LU ZH Y. Local feature extraction for iris recognition with automatic scale selection [J]. Image and Vision Computing, 2008, 26(7): 935-940.[11] TAN T N, ZHANG X B, SUN ZH N, et al.. Noisy iris image matching by using multiple cues [J]. Pattern Recognition Letters, 2012, 33(8): 970-977.[12] DAUGMAN J G. High confidence visual recognition of persons by a test of statistical independence [J]. IEEE Transaction on Pattern Analysis and Machine Intelligence, 1993, 15(11): 1148-1161.[13] DAUGMAN J. How iris recognition works [J]. IEEE Transactions on Circuits and Systems for Video Technology, 2004, 14(1): 21-30.[14] WILDES R. A system for automated iris recognition. Proceedings of the Second IEEE Workshop on applications of Computer Vision, 1994: 121-128.[15] WILDES R, ASMUTH J, GREEN G, et al.. A machine-vision system for iris recognition [J]. Machine Vision and Applications, 1996, 9: 1-8.[16] TAN T N, HE ZH F, SUN ZH N. Efficient and robust segmentation of noisy iris images for non-cooperative iris recognition [J]. Image and Vision Computing, 2010, 28(2): 223-230.[17] 吴建华,邹德旋,李静辉. 一种快速精确的虹膜定位方法 [J]. 仪器仪表学报, 2007,28 (8): 1469-1473. WU J H, ZOU D X, LI J H. Fast and accurate iris location algorithm [J]. Chinese Journal of Scientific Instrument, 2007, 28(8): 1469-1473. (in Chinese)[18] 中国科学院自动化研究所. CASIA虹膜图像数据库. Institute of Automation Chinese Academy of Sciences. database of CASIA iris image. (in Chinese)[19] WILCOXON F. Individual comparisons by ranking methods [J]. Biometrics, 1945, 1: 80-83.